https://doi.org/10.1140/epjd/e2003-00300-9
Light-induced potassium desorption from polydimethylsiloxane film
Istituto per i Processi Chimico-Fisici del Consiglio
Nazionale delle Ricerche,
Area della Ricerca, Via G. Moruzzi 1, 56124 Pisa, Italy
Corresponding author: a lucchesini@ipcf.cnr.it
Received:
20
June
2003
Revised:
15
September
2003
Published online:
2
December
2003
Potassium photoejection from polydimethylsiloxane surfaces has been observed and analyzed in detail. By diode laser absorption spectroscopy the K concentration in a sealed measurement cell without buffer gas has been monitored as a function of the environment variables, like temperature, flooding light wavelength and power. The dynamic evolution of the process has been measured too, showing differences compared to previous measurements with different alkali-metal atoms. Saturation spectroscopy on the K D1 line has been performed at room temperature by taking advantage of this phenomenon.
PACS: 34.50.Dy – Interactions of atoms and molecules with surfaces; photon and electron emission; neutralization of ions / 42.50.Ct – Quantum description of interaction of light and matter; related experiments / 68.43.Tj – Photon stimulated desorption
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
